Shadow Priest: uses both Voidweaver and Archon in raid and M+, with Archon favoring spread cleave/sustained AoE and Voidweaver favoring burst AoE and ST.
Ele and Enhancement Shaman: Farseer/Totemic in raid (mostly), Stormbringer in M+. They use both.
Sentinel does more AoE damage but Dark Ranger is literally one of the single best ST specs in the game and is played in keys sometimes. You’re blatantly wrong.
Flameshaper’s overall slightly stronger on ST and heavy AoE but Scalecommander’s nearly as good in those cases and is better in 2-4 target cleave which is Dev’s best damage profile. Dev uses both.
Boomkin: Plays Keeper in raid, plays Elune’s Chosen in AoE (so M+). Uses both.
Resto Druid: Mostly Wildstalker in M+ with some Keeper, but Keeper’s more played in raid. Uses both.
Mistweaver: Plays Conduit of the Celestials in raid and M+ but there’s a lot of Master of Harmony in M+ too. Uses both.
Holy Priest: Plays both in raid.
Resto Shaman: Plays both in raid, plays mostly Totemic in raid and entirely in keys. Still uses both.
Arcane: Plays Spellslinger in keys, plays Sunfury in raid. Plays both.
HPal: Plays both in raid, mostly plays Herald in keys. Plays both.
Outlaw: Mostly plays Trickster, but plays Fatebound in pure ST. Plays both, but leans very heavily into one.
You actually play Slayer more. Colossus has its place in keys though, but Slayer’s much better in raid.
Actually, they’re all playing Pack Leader in raid, not Sentinel. They play that in keys though.
Both are played in raid and get nearly identical numbers. Scalecommander’s just more on the Evoker themselves.
This is the only one that’s actually mostly correct; there’s some singular Ret dunking on everyone else on Sprocketmonger as Herald but that’s an Aug bug in logs.
Brewmaster: plays both, albeit one in raid and one in M+.
VDH: Plays both. Aldrachi’s slightly better at the highest levels of play in M+.
Fire: Mostly Sunfury, but Frostfire’s better into specific damage profiles. Frostfire’s occasionally played on Gally/Sprocket.
Fury: Thane’s better in AoE, Slayer’s better in ST.
Prot Warrior: Thane’s occasionally played, but it’s mostly Colossus. Thane’s not entirely outclassed.
I dunno, man. You were 1 for 6 on the specs you listed and I listed a whole lot of other specs that actually use both hero talents. Hell, some of the most restrictive ones (BDK, Pres, PPal, Disc) are the tanks and healers.